1. Department of Geological Sciences, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83844-3022, USA
2. Department of Geological Sciences, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, USA
3. School of the Environment, Washington State University–Tri-Cities, 2710 Crimson Way, Richland, Washington 99354, USA
4. Department of Geology and Geography, Ohio Wesleyan University, 61 South Sandusky Street, Delaware, Ohio 43015, USA
5. Department of Marine and Environmental Sciences, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, USA
6. Department of Geology, Portland State University, Portland, Oregon 97201, USA